Light Cahill Mayfly vs Blue-winged Olive Mayfly
Side-by-side species comparison
| Attribute | Light Cahill Mayfly | Blue-winged Olive Mayfly |
|---|---|---|
| Scientific Name | Heptagenia solitaria | Serratella ignita |
| Order | Ephemeroptera | Ephemeroptera |
| Family | Heptageniidae | Ephemerellidae |
| Size | 9-13 mm | 7-10 mm body |
| Habitat | Rivers & Streams | Rivers & Streams |
| Diet | Omnivores | Omnivores |
| Regions | North America | Europe |
| Conservation | Least Concern | Least Concern |
Light Cahill Mayfly
A pale-colored mayfly highly prized by fly fishers for imitating hatches. Nymphs prefer moderate current over gravel substrates.
Did You Know?
The Light Cahill dry fly pattern, designed to mimic this species, has been used since the 1880s.
Blue-winged Olive Mayfly
A common mayfly of clean rivers and streams with distinctive blue-grey wings. One of the most important mayflies for fly fishing. Nymphs cling to stones in fast water.
Did You Know?
So important to fly fishers that dozens of artificial fly patterns have been designed to imitate its various life stages.